Screw-machine.



LA VBRNE'W. NOYES. scnnw mcnmn.

APPLICATION FILED JUNE 10, 1901.

Patented Dec. 1, 1908.

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LA VERNE w. NOYES.

SCREW MACHINE.

APPLICATION FILED JUNE 10, 1901.

905,352. Patented Dec. 1,1908.

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1' Even an LA VERNE W. NOYBS. SCREW MACHINE.

APPLICATION IILED JUNE 10, 1901. 1,

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LA VERNE w. NOYES.

SCREW MACHINE. urmouron FILED mm 10, 1901.

Patented Dec. 1, 1908.

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LA VERNE W. NOYES, OF CHICAGO, ILLINOIS.

SCREW-MACHINE.

Specification of Letters Patent.

Patented Dec. 1, 1908.

Application filed June 10, 1901. Serial No. 63,939.

To all whom it may concern:

Be it known that I, LA VERNE W. NOYES, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented a certain new and useful Improvement in Screw-Machines, of which the following is a full, clear, concise, and exact description, reference being had to the accompanying drawing, forming a part of this specification.

My invention relates to a screw machine more particularly designed for cutting threads upon metal pipes, but equally applicable to the cutting of threads upon other structures.

I have illustrated my invention in the accompanying drawings in which Figure 1 is a view of the machine in elevation. Fig. 2 is a sectional view on line 22 Fig. 1. Fig.3 is a sectional view on line 33 Fig. 1. Fig. 4 is an end view of the carriage carrying the cutters. Fig. 5 is a sectional view of the carriage, driving pinion andits mounting. Fig. 6 is an end view thereof. Fig. 7 is a sectional view illustrating the manner of mounting the cutters. Fig. 8 is a view of the device for removing the bur from the end of the pipe being threaded. Fig. 9 is a sectional view on line 18-"18, Fig. 4. Fig. 10 is a detailed View of the bolt and nut shown in Fig. 9. Fig. 11 is an end view of :slide, suitable guides being provided to properly direct the travel of the carriage. Thecarriage, 12, comprises a base, 6, and a part, b adapted to support the cutters, the part, 6 being secured to the part, b, by The part, b", which supports the cutters carries two up wardly extending disks 6*, b in which the respective ends of the cutters are mounted. The structure of the cutters is illustrated I more clearly in Fig. 7 Each cutter consists illustrated. One end of the cutter is mounted in a suitable bearing in the disk, I), while the other end of the cutter carries a threaded part, 0 which is seated in a correspondingly threaded bearing in the disk, I). The cutter is provided at the extreme end with a portion, 0, which is other than circular in form, in order that it may be grasped by a suitable part for rotating the cutter within its bearings. In mounting the cutters in their bearings a gage or dummy, d, is provided carrying threads corresponding to the threads which are to be cut upon the pipe or other part to be operated upon. The cutters are placed in 1position with the threaded parts, 0, proper en avin the a e or tem let (Z, and Bab bitt In tal is thei i f of'med ardiind the portions of the cutters within the openings through the disks, 6*, 6 respectively. Bearings are thus formed for the cutters and the hearings in the disk, 6", will be of cylindrical form, while the bearings within the disk, 6 will have threads to receive the threads upon, the parts, 0 of the cutters. The cutters having thus been properly mounted in their supports, the templet, cl, may be removed.

Engaging the ends, 0, c of the respective cutters are the levers, e, 6, having bifurcated ends engaging the cylindrical portions of the nuts, 6, 6, shown in Figs. 4, 9 and 10. The bolts, 6 6 pass through the slots, 6 6 respectively, and the nut, c, is thus clamped at a particular location in the slot. The bifurcated end of the lever is free, however, to rock about the cylindrical portion of the nut, c, as the ring, 6 carrying said slots, 6 is rocked back and forth. The ring, 6*, is provided with a central circular opening and is seated upon the disk, I), so that the same may be rocked about said seat by means of the handle, A latch, 0 associated with the handle, 0", is adapted to engage slots in an upwardly extending portion, b, of the disk, I). The latch, 6 while engaging one or the other of the slots in the part, b, maintains the disk, a in either of its rotated positions. The rotation of the disk, 6*, thus serves to move the ends of the levers, e, e, thereby rocking the cutters for a purpose which will be hereafter described. The angular position of the cutter within its bearings may be adjusted at will by means of the nut, e, and bolt, 6 by properly moving the same along the slot, 6 and clamping the same in the desired adjusted position. In

order to remove the inwardly extending bur from the end of the pipe being operated upon, a cutting tool, f, is supported in the disk, b ,'being passed through a slot or channel, 6 provided in said disk, at a central location. The end of this tool, f, as shown in Fig. 8 is adapted to project into the end of the pipe as the same is fed forward, and the bur is thus removed. For advancing the carriage, b, by hand, a rack, b is provided upon the under side of the carriage adapted to engage a pinion, g. which is carried upon the end of a shaft, 9, supporting upon the end a hand wheel, 9 The mounting for the pinion g, is shown in detail in Figs. 5 and 6. A sleeve, 9 serves as the bearing for the shaft, g, and the pinion, g, is fixedly mounted upon the shaft, g, at a short distance from the end thereof, so as to leave a projecting portion, 9 of the shaft, which is adapted to be supported in an opening, 9 provided in the table, a. The pinion, g, is thus supported upon opposite sides and being of a diameter not exceeding that of the outer diameter of the sleeve, 9 the sleeve, 9 the pinion and the shaft may be removed together from the opening in the table, a, which is formed to receive them. A collar, is formed upon the outer end of the sleeve, 9 which is adapted to limit the inward movement of the sleeve, and screws, g 9 are adapted to pass through the collar to se cure the sleeve in position. By mounting the pinion in the manner above described the same may be readily removed from its mounting and inserted therein at will. By turning the hand wheel, 9 the carriage, b, may be caused to travel back and forth upon the table, a.

The chuck which serves to clamp in position the pipe or other article to be threaded may be ofany desired suitable type. As shown, the chuck consists of a head 72. within which are mounted suitable jaws (not shown), the head being secured by intermediate means to the end of a sleeve (4*, which rotates within a bearing sleeve 64 secured to the bracket a of the standard a of the machine. Upon the rear end of the sleeve a is mounted the gear wheel a, which meshes with the pinion a mounted upon the shaft a suitably supported in bearings, and carrying in the present instance a cone pulley a through which passes a driving belt a Intermediate of the head It and the bearing sleeve a is a movable collar 7L provided with lugs, each lug having an oblique slot 7% through which passes a screw it secured to the sleeve (6 A link 72. connects the collar /L with a pedal 7L7 whereby the pedal when depressed rocks the collar 7%.

The pipe to be threaded is passed through the central opening in the chuck and rests loosely therein until the pedal 721 is depressed, whereupon the collar, 71 is rocked,

thereby forcing the jaws of the chuck into engagement with the pipe to grip the same and cause the said pipe to rotate with the chuck. The head of the chuck carrying the jaws is suitably connected through interme diate means with the gear wheel a which is continuously rotated during the operation of the machine. The pipe being thus clamped within the chuck, and being rotated, the carriage, Z), carrying the cutters is moved forward by means of hand wheel, 9 until the cutters engage the end of the pipe, whereupon the cutting process is commenced. During the further operation of cutting the threads the carriage Z), will be fed forward automatically due to the engagement of the cutters with the pipe. When the thread has been completed the operator grasps the handle, c and rocks the ring, 6", in the manner iereinbefore described thereby rocking each of the cutters to carry the cutting edges of the cutters out of engagement with the threads which have been cut upon the pipe. The longitudinal channels formed in the cutters for the purpose of producing the cutting edges are thus brought opposite the threads on the pipe, and the pipe is released by the cutters. The pedal, 72?, is released and the spring, 7L raises the pedal thereby rocking the collar, 7L2, to cause the chuck to release the pipe. Another pipe may now be inserted in the chuck and the operation repeated, the ring, 6, being moved back to its initial position at the proper time to bring the cutting edges of the cutters into play.

Considering now more particularly the construction and operation of the cutters, it is to be observed that for cutting right hand threads, the threaded parts, a, of the cutter should be cut with a left hand thread, while for cutting left hand threads, the parts, 0, should be formed with a right hand thread. Moreover, the threaded part, 0 of the cutter which passes within the bearing should be cut with a thread having the same pitch as the thread upon the part, 0. As the cutter becomes dulled, the cutting face is ground away in sharpening the cutter, and by having the bearing portion, 0 threaded, the cutter may be adjusted longitudinally within its bearing to compensate for the part ground away in sharpening the cutter. While 'the threading of the bearing portion of the cutter is not essential to the operation of the machine, it very materially facilitates the adjusting of the cutters and as the wear upon the cutting edge is considerable, it becomes necessary to frequently regrind the cutters and to adjust them in position. By the employment of the threaded bearing, the rotation of the cutter to carry the plane of the cutting edge into the proper position insures the proper longitudinal position of the cutter. By providing three or more cutters the cutters themselves will serve to center cutters.

the pipe or part being threaded. If less than three cutters be employed, it will be necessary to employ auxiliary means for center ing the part being threaded and for this reason I preferably employ three or more I have illustrated a machine embodying four cutters, this being the number which I have employed in practice for cutting pipe of ordinary size, but it will be understood that a less or greater number may be employed without departing from the spirit of my invention.

In Fig. 12, I have shown a modification of the cutter in which the end which is noncylindrical, is tapered and is adapted to fit in a correspondingly tapered socket in the end of the arm, 6, the end of the cutter being wedged within said socket, through the agency of the bolt, 6

Having described my invention what I claim as new and desire to secure by Letters Patent is 1. In a screw cutting machine, the combination with a suitable support, of a plurality of cutters each cutter comprising a threaded cutting portion having a cutting edge, and a bearing portion upon each side of the cutting portion, one of said bearing portions being threaded; and bearings carried by said support, one of said bearings being threaded to receive the threaded bearing portion of each cutter.

2. In a screw cutting machine, the combination of a carriage provided with a suitable support, of a plurality of cutters mounted in said support each cutter having a threaded portion provided with a cutting edge, of means for axially turning said outters in unison, and means for axially turning said cutters independently of one another.

3. In a screw cutting machine, the combination with a plurality of cutters each having a threaded body portion provided with a channel forming a cutting edge and a threaded bearing portion, of a support having threaded bearings for said bearing portions, means for axially turning said cutters to change the position of said threads, and means whereby each cutter may be independently turned in its respective bearing, substantially as described.

4;. In a screw cutting machine, the combination with a plurality of cutters each having a threaded portion provided with a longitudinal channel forming a cutting edge, of a support having journals for said outters, a rocking ring or annulus, and a plurality of levers each connected at one end with the respective cutters and at the opposite ends with said ring or annulus.

5. In a screw cutting machine, the combination with a plurality 'of cutters each having a threaded part provided with a channel forming a cutting edge and a threaded bearing portion, of a suitable support having a threaded bearing for the bearing portions of said cutters, a movable ring or annulus, a plurality of levers each connected at one end with the cutters and at the opposite ends with said ring or annulus, and means for adjusting said levers relatively to said ring or annulus.

6. In a thread cutting machine, the combination with a suitable support, of a plu rality of cutters, each having a threaded part provided with a cutting edge, of a rocking ring or annulus carrying a plurality of slots, a plurality of levers each lever being connected at one end with one of said cutters, a plurality of bolts, one connecting the end of each lever with said ring or annulus, and passing through one of said slots, whereby said levers may be adjusted in angular position, substantially as described.

7 In a thread cutting machine, the combination with a plurality of cutters each having a threaded part provided with a cutting edge and a threaded bearing portion, of a suitable support having threaded bearings for the threaded bearing portions of said cutters, a rocking ring or annulus having a plurality of slots, a plurality of levers, each lever being connected at one end with said cutters, a plurality of bolts, one connecting the end of each lever with said ring or annulus and passing through one of said slots whereby said lever may be adjusted in angular positions.

8. In a thread-cutting machine, the combination of a work-carrying chuck; means for operating said chuck; a carriage; a plu rality of cutters carried by said carriage, each cutter having. a threaded cutting part intermediate of two bearing portions; a movable ring; a plurality of slots in said ring; bolts to engage said slots; a plurality of levers, each lever being bifurcated at one end to embrace one of said bolts and connected at the other end to its respective cutter; and means for moving said ring whereby the cutters are thrown in and out of operative position.

9. The combination with a traveling carriage, of a pair of supporting members carried thereby and spaced apart, a plurality of cutters, each cutter comprising a threaded part provided with a cutting edge and end bearing parts arranged to be mounted in said supports, and means independent of said supports for throwing said cutters in and out of operative position.

10. In a thread cutting machine, the com bination of a suitable support; a plurality of cutters, each having a threaded part provided with a cutting edge; a movable ring; aplurality of slots in said ring; bolts to engage said slots; a plurality of levers, each lever being bifurcated at one end to embrace one of said bolts and connected at the other end to its respective cutter; and means whereby the ring is moved for throwing the cutters in and out of operative position.

ll. In a thread-cutting machine, the combination of a plurality of cutters spaced apart in angular relation, each adapted to be rocked into and out of operative position, a support having journals for said cutters, an angularly movable ring for simultaneously throwing said cutters in and out of operative position, and levers connecting said cutters with said ring.

12. In a. thread cutting machine, the com bination of aplurality of cutters; a support having journals for said cutters; a movable ring; a plurality of levers operatively con necting said cutters With said ring; means for adjusting said levers relatively to said ring; and means for simultaneously throwing said cutters in and out of operative po sition by moving said ring.

In Witness whereof, I have hereunto subscribed my name in the presence of two Witnesses.

LA VERNE W'. NOYES.

\Vitnesses V. CLYDE JONES, C. B. CAMP. 

